Treasurest up unto thyself wrath against the day of wrath; this passage seems to respect Deuteronomy 32:34,35, or Job 36:13. You have a parallel place, James 5:3. The meaning is, Thou provokest more and more the wrath of God against thee; by heaping up sins, thou heapest up judgments of God upon thyself: just as men add to their treasure of wealth, so dost thou add to thy treasure of punishment. Revelation of the righteous judgment of God; this is a periphrasis of the day of judgment, or of the last day: then will God visit for those sins that here escape punishment; then the justice and equity of his proceedings shall appear, and all shall have reason to approve thereof.
Related Commentaries of Romans 2:5
Romans 2:5
5 But after thy hardness and impenitent heart treasurest up unto thyself wrath against the day of wrath and revelation of the righteous judgment of God;